Pipe threader



Dec. 14, 1943. 'G. J. SELLMEYER 2,336,964

PIPE THREADER F iled Jan. 25, 1945 4 Sheets-Sheet 1 eiimeyer Dec. 14, 1943. a. J. SELLMEYER 2,336,964

PIPE THREADER Filed Jan. 25, 1943 4 Sheets-'Sheet 2 v ZJ af elzmeyer Dec. 14, 1943. e. .L SELLMEYER PIPE THREADER Filed Jan. 25, l945 4 Sheets-Sheet 3 Dec. 14, 1943. a. J. SELLMEYER PIPE THREADER Filed Jan. 25, 1943 4 Sheets-Sheet 4 Patented Dec. 14, 1943 UNITED STATES PATENT OFFICE 2,336,964 PIPE THREAD'ER Gilbert J, Sellmeyer, Indianapolis, Ind.

Application January 25, 1943, Serial No; 473,528

9 Claims.

This invention relates to pipe threading devices.

An object of this invention is to provide an improved power operated pipe threader which may be secured to the underside of a supporting stand or table.

Another object of this invention is to provide a pipe threading means including a pipe holding chuck, a reduction driving means and a motor connected with the driving means, the entire,

apparatus being positionable beneath a table such as a conventional pipe stand. 7

A further object of this invention is to provide in a device of this kind an improved guide means for supporting the pipe while it is being threaded so as to relieve the threading means of torsional strain or of whipping during the threading operation.

A further object of this invention is to provide in a device of this kind an improved driving gear assembly which is in the form of planetary gearing and is so constructed as to permit the ready changing of speed of rotation of the'holding chuck.

A further object of this invention is to provide in a device of this kind an improved means for" holding the chuck and chuck barrel in the selected gear speed.

To the foregoing objects and to others which may hereinafter appear, the invention consists.

of the novel construction, combination and arrangement of parts, as will be more specifically referred to and illustrated in the accompanying drawings, wherein is shown an embodiment of this invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention, as claimed.

Figure 1 is a detail top plan partly broken away of a pipe threading device constructed to an embodiment of this invention.

Figure 2 is a detail side elevation partly broken away of the device.

Figure 3 is horizontal section partly in detail through the device.

Figure 4 is a sectional View taken on line 3-4 of Figure 3.

Figure 5 is a sectional view taken on line 5-5 of Figure 3.

Figure 6 is a sectional view partly in front elevation of the device and taken on line Ii6 of Figure 2.

Figure 7 is a sectional view taken on line 1-1 of Figure 2.

Figure 8 is a sectional view taken on line 8-8 of Figure 3. M

Referring to the -drawings, the numeral I 8 designates generally'a stand which includes a table II having a plurality of supportinglegs I2 secured thereto for supporting the table II at the desired. elevation. In order toprovide a means whereby a pipe may be threaded. I have provided a chuck Iii of conventional construction which is fixedly secured to a cylindrical tubular chuck barrel I4. The pipe is adapted to be ex.- t'ended through the .barrel I l and gripped or clamped by the chuck I3 with a portion of the base extending l oe'yoniclv the chuck l3 s'othat .a pipe threading die structure [5 may be engaged with the projected portion. of the pipe..

The die structure I5 includes an elongated handle I6 and in the present instance the handle I6Yis adapted to contact against an elongated tubular stop member I! during the threading operation. A second tubular stop member IB' is disposed at the opposite side of the table I I' from the tube l'l and the tube IB' is adapted. to be engaged by the handle I6 during the reverse rd- .tation 0f the chuck l3 or for clittingfllefthahd threads.

The stop memberv f! is s'lidably supported at one .side of the, table II by meansIof .a pair or spaced apart bushings or sleeves I9 which are welded or otherwise fixed tolthe side of the table I i. The stop member I8 is also slidable relative to the, table II being loosely mounted in supporting bushings or sleeves 20 which are welded or otherwise fixed to the table I I, opposite from the bushings I91 The stop members I1 and [dare adapted to be shifted manually e'ndw'ise .s'o'asto dispose a selected one of these stop merfibrsin an'ope'rative position in the' path of the. swinging movement of the handle Hi.

The chuck barrel l liisjo'llrnalle'd in' ahousi'ng generally designated by the earner-arch, The housing 2I is provided with a base 22 whichin the present instance is" uppermost and is secured byrastening' bolts 23130 the lower side of the table H. The housing .21 l'ficllid'e s an annulariwau 24 which has formedintegral therewith inwardlyexte'nding wall 25; A rdllCe'dIdidfliter sleeve 01 bushing. 2611s fcrmedmtegral with the wan 25 and the S1ee'Ve26 'allsohi'tls formed ifiteglal therewith a reduced diameter bearing seer-e121. The sleeve-27 has mounted therein a plurality of antifriction bearing rollers 2'8,which-engage the periphery of the chuck barrel I4 so as-to; rotatably support the barrel 14 .in the bearin .s1eeve'2l'.

the inner side of the jacent side of the The gears 68-(see Figure A sealing ring or washer 29 may be disposed in the outer end of the bearing sleeve 21 and may be positioned in an annular groove 39 formed in an inwardly projecting flange 3| carried by the bearing sleeve 21. The pipe which is extended through the barrel I4 may be held concentrically to the barrel by means of a removable bushing or sleeve 32 which is removably mounted in the rear end of the barrel I4. A flange 33 is formed integral with the'sleeve' 32 and limits the extension of the sleeve 32 in the barrel l4.

The chuck barrel I4 is rotated in the desired direction by means of a motor 34 which is preferably of the reversible type so that the barrel I4 may be rotated in the desired or selected direction. The motor 34 has an armature shaft 35 formed with a coupling flange 3B. The coupling flange 36 is secured to a complementary coupling flange 31 which is carried by a shaftv 38. The housing 2| includes agear housing 39 which is offset to one side of the annular housing-wall 724. The gear housing 39 includes opposed parallel wal1s4| and 42 which are connected'together by means of a connecting wall 43. "The drive shaft 38 is journalled through the opposed walls 4| and 42, and has mounted thereon a gear 44 and the gear 44 meshes with a gear 45 which is fixed to a shaft 46, and a'second gear 41 smaller in diameter than the gear 45 is also fixed on the shaft 45. The gear 41 meshes'with a gear 48 which is mounted on a shaft 49 and a second gear 59 is fixed relative to the gear 43 and is of a diameter smaller than the gear 48. The gear 50 is in constant mesh with a large driving gear 5| which is mounted in the annular wall 24.

'The gear5l has formed integral therewith a cylindrical flange 52 and an annular flange 53 extends inwardly from the flange 52. A cylindrical bearing 54 extends from the annular flange 53 and isrotatable in the bearing or bushing 26. A plurality'of antifriction rollers 55 are interposed"between cylindrical member 54 and member 54 is provided at its outer endflwith an annular flange 56 which is formed withan annulargroove 51. A set screw v5B is threaded through the bearing sleeve 25 and engages in the groove 51 so as to hold the sleeve 54 against endwise movement. The set screw 58 is locked in adjusted position by means of a lock nut 59.

The gear 5|, which is termed a bell gear, has

secured thereto a plurality of circumferentially spaced'apart shafts 60 on which are mounted pinions 62. The'pinions 62' meshwith an internally toothed ring gear 63 which is fixed'by fastening members 64 to the inner side of the annular wall 24. The pinions 62 also mesh with asun gear 65 which'is keyed'or otherwise fixedly secured to the chuck barrel l4. The two flanges 52 and'53 form an annular chamber 65 within which the gear 65 is adapted to be moved when the gear 65 is moved to a disengaged position with respect to the orbit gears 62.

The bell gear 5| also hassecured thereto a second series of pinion shafts 61 on which are rotatably mounted planetary gears 68. The gears 68 are held in spaced relation to the adbell gear 5| by means of bearing sleeves 69 whichmay be cast with the bell gear 5| or maybe in the form of 'spacingsleeves. 5) also meshwiththe bearing 29; The cylindrical an annular housing 95 which is formed at one fixed gear'63 and are adapted to be selectively M keyed or otherwise fixed to the barrel l4 spaced from the gear 65. The housing 2| also includes a removable plate 19 which has formed integral therewith a cylindrical flange 1|, an annular flange l2 and a bearing sleeve 13 which extends forwardly from the annular flange 12. The two flanges ii and 12 form a gear chamber 74 within which the gear 59 is adapted to engage when the latter is in a disengaged position.

The gear 69 has formed integral therewith a sleeve 15 which is rotatable in the bearing sleeve 13 and the sleeve 15 is formed with an annular groove l5 within which rollers 11 are adapted to engage. The sleeve 15 is also formed with a pair of annular grooves or channels l8 and 19 on opposite sides of the groove 15 and a clutch pin 89 is adapted to engage in a selected one of the two grooves 19 and E9. The clutch pin is slidable through an opening 8| formed in the bearing sleeve 13 and a clutch pin operating lever 82 is secured at an intermediate point along the length thereof by means of a pivot pin 93 to the outer end of the clutch pin 89. The clutch operating lever 82 is rockably mounted on a pivot member 84 carried by an ear or boss 85 which may be formed integral with the plate 19.

The clutch pin 89' is constantly maintained in a clutching position by means of a spring 86. One end of the spring 85 bears against a pin 81 extending diametrically through the pin 89, and the other or outer 'end of the spring 86 bears against a spring housing 88, which is secured about the spring 99' and in the present instance is'secured by a fastening member 89 to the sleeve 13. The forward end of the sleeve 15 bears against a sealing washer which is mounted in an annular groove 9| formed in the sleeve-13, and an annular flange 92 is formed integral with the sleeve 73 and provides a forward wall against which the sealing member 99 is adapted to bear. The plate 15 is adapted to beremovably secured to the annularwall 24 by means of fastening members 93.

The pipe, during the rotation thereof, is rotatably supported in a guide structure generally designated as 94. The guide structure 94 includes end thereof with an integral annular flange 96 and a removable annular flange 9i. Antifriction rollers 98 are mounted in the housing 94 and the rollers 98 may be of the type embodying the use of annular cages 99 at the opposite ends thereof. A removable bushing, including a cylindrical body I09 and an annular flange |0|, is adapted to engage within the housing-94 and engage the rollers 98. The housing 94 is secured to a depending standard 192 formed with a base I93 which is secured by fastening members I94 to the lower side of the table ll in a position spaced rearwardly from the collar or bushing 32. The motor 34 is provided with a base I95 which may be secured by fastening members I93 to the lower side of the table II. V

In the use and operation of this pipe threading mechanism, the pipe tobe threaded is extended through the guide structure including the housing 94 and the bushing N19. The desired size bushing is inserted in the housing 94 so that there will be a minimum amount of play between the pipe and the bushing Hill. A similar bushing 32 is inserted inthe rear end of the chuck barrel l4, and the pipe then moved endwise through the chuck barrel l4 and the chuck. The pipe is then firmly clamped by the chuck l3. The motor 34 is then operated to rotate the chuck rotatably carried'b'y the bell gear will rotate-the driven gear 85.

ase-e964 barrel l' lin'the desired direction. 'Where a fa'irly small diameter pipe is-bemg-thre'aded thegear 65, which is the high speed-gear;isdisposed in The gear fi l through the pinions-62 which-are If it is desiredto rotate thechuck ba rrel and thechuckat a slower speed, as where a large diameter pipe is being threaded-the chuck-barrel --I4- is moved inwardly or en'dwise after firstrocking the lever 82 outwardly so as to draw the clutch pin 80 out -of the groove- 13. The clutch barrel maythen be moved inwardly, moving therewith the sleeve 75 and the gear 69 so that the gear 69 will be rotated by the planetary gears 68. At this time the clutch lever 82 is released so that the spring 86 will move the clutch pin inwardly into the low speed groove 19.

The die structure I5 is inserted on the pro- J'ected end of the pipe and the handle I6 is engaged with, as an example, the stop member II which is manually moved forwardly in the path of the rotation or swinging movement of the handle it. When the pipe has been threaded for the desired length the motor 34 may be reversed, thereby rotating the chuck l3 and the chuck barrel [4 in a reverse direction, at which time the handle l6 will swing over and engage the stop member 18.

A pipe threading mechanism as hereinbefore described will provide a power operated threading structure which may be secured to a portable pipe stand so that the pipe may be threaded either by means of the conventional hand operated die or it may be threaded by the power operated structure hereinbefore described.

What is claimed is:

1. In a pipe threading machine, work supporting and rotating means comprising a table and supporting legs, a housing dependingly secured to said table, a chuck barrel journalled through said housing, a chuck fixed to one end of said barrel, a pair of sun gears fixed on said barrel in spaced apart relation, a bell gear journalled about said barrel, a ring gear fixed in said housing, low speed pinions rotatably carried by said bell gear, high speed pinions rotatably carried by said bell gear, all of said pinions meshing with said ring gear, means for rotating said bell gear, and means carried by said housing holding a selected one of said sun gears in mesh with a selected group of said pinions.

2. In a pipe threading machine, work supporting and rotating means comprising a table and supporting legs, a housing dependingly secured to said table, a chuck barrel journalled through said housing, a chuck fixed to one end of said barrel, a pair of sun gears fixed on said barrel in spaced apart relation, a bell gear journalled about said barrel, a ring gear fixed in said housing, low speed pinions rotatably carried by said bell gear, high speed pinions rotatably carried by said bell gear, all of said pinions meshing with said ring gear, means for rotating said bell gear, a bearing sleeve fixed to one of said pair of gears and formed with a pair of annular clutch grooves, and a spring-pressed clutch pin carried by said housing engageable in a selected clutch groove for holding a selected sun gear in mesh with a selected group of pinions.

' 3; In ampe threading-machine, work-support- "ingand rotating -means comprising a *tabl and supporting legs; a" housing dependinglysecured to said table, a chuck barrel journa'lled' through 1 said housing,"said-barrel-being also shift-able endwiserelative'to' said housing, a chuck fixed toone end of said'barrel', a-pairof sun'gears fixed on "ried by'said bell gear,'high speed; pinions rotatsaid barrel in spaced apart relation, a bell gear journalled about said barrel, a "ringgea'r' fixed in said housing, "low speed pinions rotatably carably carried by said bell gear, all of "s'aidpinions meshing with'said ring gear, meansforrotating "said bell 'gear, a bearing-sleeve fixed to 'one of said pairofge rs and 'formedwith a air of annular clutch grooves; a' spring pressed clutch pin "carried by said "housing engageable" in a selected clutch groove for holding a selected sun gear in mesh with a selected group of pinions, and a clutch pin operating lever pivotally connected to said pin and rockably carried by said housing.

4. In a pipe threading machine, work supporting and rotating means comprising a table and supporting legs, a housing dependingly secured to said table, a chuck barrel journalled through said housing, a chuck on said barrel, change speed means for rotating said barrel, a cylindrical pipe guiding collar removably engaging in one end of said barrel, and a supporting guide dependingly fixed to said table in spaced relation to said collar.

5. In a pipe threading machine, work supporting and rotating means comprising a table and supporting legs, a pipe chuck, means rotatably supporting said chuck beneath said table, means for rotating said chuck, a cylindrical pipe guide spaced from said second mean and axiall aligning with said chuck, and means dependingly supporting said guide beneath said table.

6. In a pipe threading machine, work supporting and rotating means comprising a table and supporting legs, a pipe chuck, means rotatably supporting said chuck beneath said table, means for rotating said chuck, a cylindrical pipe guide spaced from said second means and axially aligning with said chuck, means dependingly supporting said guide beneath said table, a collar rotatably engaging said guide and anti-friction bearing means for said collar.

'7. In a pipe threading machine, work supporting and rotating means, comprising a housing, a tubular chuck barrel journalled through said housing, a chuck on one end of said barrel, a high speed sun gear fixed on said barrel, a low speed sun gear fixed on said barrel, a driving gear rotatable about said barrel, means holding said driving gear against endwive movements, a sleeve fixed to said low speed sun gear and formed with a pair of spaced apart clutch grooves, said barrel having selected endwise movement relative to said housing, clutch means engageable in a selected groove, low speed pinion rotatably carried by said driving gear and adapted to selectively mesh with said low speed sun gear, high speed pinions rotatably carried by said driving gear and adapted to selectively engage with said high speed sun gear, a stationary ring gear fixed in said housing and meshing with said low and high speed pinions, and a reduction gearing connected with said driving ear.

8. In a pipe threading machine, work supporting and rotating means comprising a housing,

a tubular chuck barrel journalled through said housing, a chuck on one end of said barrel, a high speed sun gear fixed on said barrel a low speed sun gea 'fixed on said barrel, a-driving gear rotatable about said barrel, means holding said driving gear against endwis movement, a sleeve fixed to said low speed sun gear and, formed barrel having selected endwise movementrelative to saidhousing, clutcn'means en'gageable in a selected groove, low speed pinions rotatably carried by said driving gea and adapted to'vselectively mesh with said low' speed sungear, high I with a pair of spaced apart clutchgrodves, said with said driving gear, and a flanged collar removably engaging in the end of said barrel opposite from said chuck.

9. In apipe threading machine, work supporting and rotating mea'ns comprising a table and thesupporting legs, a housing dependingly securedto said table, a chuck barrel journalled through said housing, a chuck on said barrel,

change speed means for-rotating said barrel, a pipe guiding collar removably engaging in one 1 end of said barrel, a cylindrical supporting guide ingly supporting said stop members.

dependingly fixed to said table in alignment with and spaced from said collar, a pair of elongated stop members disposed one at each side of said table and means fixed relative to said table slid- GILBERT J. SELLMEYER. 

